Title (de)

Title (fr)

Publication

Application

Priority

JP 32053899 A 19991111

JP 32053999 A 19991111

JP 2000252111 A 20000823

JP 2000252112 A 20000823

Abstract (en)

A method of exchanging color-information includes the steps of: (1) grouping color spaces of CIELAB of a source device and an output device; (2) calculating gravity vectors and gravity points of each color category grouped in respective devices; (3) producing a color space normalized by using gravity vectors calculated for each color category of respective devices and variance covariance matrix expressing an extension from the gravity point as a center; (4) mapping control points of corresponding color category provided in respective normalized color spaces; and (5) exchanging color information by finding an agreement between the color categories of the two normalized color spaces as well as preserving color-perceptive-quantity such as chroma of two corresponding colors in the respective normalized color spaces. This method achieves that overall impressions of images rendered on each device produce difference as little as possible. <IMAGE>